如何在application.conf中读取数组环境变量？

Question

我想在application.conf中定义一个变量，它将是一个字符串列表。目前在application.conf中我有这样的东西：

some.env.variable = ["a", "b"]

我试过了：

some.env.variable = ${?I_AM_ENV}.split(",")

当I_AM_ENV = a，b
时 但它没有用

加载应用时收到错误：

Wrong value type at 'some.env.variable', expecting: list but got: string

Answer 1

根据documentation：

// in your env
export OPTIONAL_A='"b", "c"'

// in application.conf
path = [ "a", ${?OPTIONAL_A} ]

应评估path至["a", "b", "c"]

Answer 2

花点时间，但我们找到了。

application.conf

    access-control-allow-origin = ["http://localhost:4444"]
    access-control-allow-origin = ${?CLIENT_DOMAIN}

    export CLIENT_DOMAIN.0=http://localhost:3000
    export CLIENT_DOMAIN.1=http://localhost:3001